Water Bottle Battery Cases

Why do assemblers choose a Water Bottle case?

2 Water Bottle models across 36 V – 72 V systems, on 18650 and 21700 cells — empty shells, MOQ one piece. Mounts on standard bottle bosses — the lowest-cost way to add range to a frame with no down-tube space.

Bottle-mount housings use the bosses every frame already has. There is no bracket to design, no dock to fit, and no change to the frame silhouette — which makes them the cheapest route to a second pack or a longer range on a commuter build.

We tool two bodies. ALX054 takes 40 x 18650 on a 215 mm tube or 52 x 18650 on a 280 mm tube. The longer ALX105 carries a keyed lock on a separate base plate, so the pack can be removed and left secured. Both ship as empty shells — cells, BMS and harness stay with you.

Popular on step-through frames, small-wheel commuters and older bikes being converted, where the down-tube is either absent or already occupied.

Also known as: also known among buyers as a kettle battery case or bottle battery — usually the answer on frames where the bottle bosses are the only mounting point, like step-throughs and small-wheel commuters.

• Uses standard bottle bosses — No bracket design, no extra tooling on the frame.
• Cheapest way to add range — Small body, simple fitment, low unit cost.
• Locking option — ALX105 takes a keyed lock and a removable base plate.
• Ideal for step-through frames — Where the down-tube is missing or occupied.